One-Rep Max Calculator
Estimate your one-rep max for bench press, squat or deadlift from the weight and reps of a set, with a percentage chart.
Enter your values and press Calculate.
How to use the One-Rep Max calculator
Estimates are most accurate for sets of 10 reps or fewer. Use the same unit (lb or kg) you lifted in.
Formula
Epley: 1RM = w × (1 + reps ÷ 30). Brzycki: 1RM = w × 36 ÷ (37 − reps).
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